UIC §13028.5: (a) For purposes of this division (and so much of Part 10 (commencing with Section 17001) and Part 10.

(a) For purposes of this division (and so much of Part 10 (commencing with Section 17001) and Part 10.2 (commencing with Section 18401) of Division 2 of the Revenue and Taxation Code as relates to this division) any supplemental unemployment compensation benefit paid to an individual shall be treated as if it were a payment of wages by an employer to an employee for a payroll period. (b) For purposes of subdivision (a), “supplemental unemployment compensation benefits” means amounts which are paid to an employee, pursuant to a plan to which the employer is a party, because of an employee’s involuntary separation from employment (whether or not that separation is temporary), resulting directly from a reduction in force, the discontinuance of a plant or operation, or other similar conditions, but only to the extent those benefits are includable in the employee’s gross income.